| 摘要 |
A control device of an internal combustion engine switches the air-fuel ratio of in-cylinder gas from a lean first air-fuel ratio for normal operation to a rich second air-fuel ratio, and carries out intake air restriction during a switching period from the start to the end of the switching. A main injection is performed at or around a compression top dead center, prior to the start of switching, and the main injection and a first after injection that results in incomplete combustion of injected fuel are performed after the end of switching. During the switching period, the main injection is performed, and a second after injection that results in incomplete combustion of injected fuel is performed at a time earlier than the first after injection. |
